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Texas Instruments SN74LVC2G125DCT3
- Part No.:
- SN74LVC2G125DCT3
- Manufacturer:
- Texas Instruments
- Package:
- 8-LSSOP, 8-MSOP (0.110", 2.80mm Width)
- Datasheet:
-
SN74LVC2G125DCT3.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V SM8
- Quantity:
- Payment:
- Shipping:
Inventory:15,055
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Product details
Overview
SN74LVC2G125DCT3 from Texas Instruments is a dual 3-state bus buffer gate IC designed for 1.65-V to 5.5-V operation, featuring two independent noninverting buffers with active-low output-enable controls (1OE, 2OE), ±24-mA drive at 3.3 V, 4.3-ns max propagation delay, and Ioff support for live insertion in partial-power-down systems. It is used in high-speed data acquisition, video infrastructure, and SSD interconnects.
For engineers reviewing the SN74LVC2G125DCT3 datasheet, SN74LVC2G125DCT3 pinout, SN74LVC2G125DCT3 application, or SN74LVC2G125DCT3 equivalent, key selection considerations include 3.3-V/5-V mixed-voltage translation capability, overvoltage-tolerant inputs up to 5.5 V, guaranteed high-impedance outputs during power sequencing, and NanoFree™ SM8 package compatibility with space-constrained PCB layouts.
Technical Context
The SN74LVC2G125DCT3 implements two independent noninverting buffer functions (Y = A) with separate active-low output-enable inputs (1OE, 2OE). Each buffer drives its output to high or low when OE is low, and enters high-impedance state when OE is high - enabling bidirectional bus control without contention.
It supports voltage-level translation: inputs tolerate up to 5.5 V regardless of VCC (1.65–5.5 V), allowing down-translation from 5-V logic to lower supply domains. Its Ioff circuitry ensures <±10 µA leakage when VCC = 0 V, preventing back-drive damage during hot-swap or partial power-down.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V - enables interoperability across 1.8-V, 2.5-V, 3.3-V, and 5-V logic domains |
| Max Propagation Delay | 4.3 ns at VCC = 3.3 V, TA = –40°C to +85°C - supports >100-MHz signal routing in high-speed digital interfaces |
| Output Drive | ±24 mA at VCC = 3.3 V - sufficient to drive multiple CMOS loads or moderate capacitive traces without external buffering |
| Input Voltage Tolerance | Up to 5.5 V - allows direct connection to 5-V sources while operating at 3.3 V or lower, eliminating level-shifters |
| Ioff Leakage | ±10 µA max at VCC = 0 V - prevents current backflow during hot-plug or system sleep states, protecting upstream drivers |
| ESD Rating | 2000-V HBM, 1000-V CDM - meets industrial handling requirements without additional protection circuitry |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood, industrial motor control, and telecom infrastructure use |
Pinout & Package
SN74LVC2G125DCT3 uses the SM8 (DCT) package: 8-pin small-outline package with 2.95 mm × 2.80 mm body size, gull-wing leads, and standard 0.65-mm pitch. Pin 1 is marked by a beveled corner or dot; device orientation follows JEDEC MO-178.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OE | Active-low output enable for buffer 1 - pull high to disable 1Y; tie to VCC via pullup resistor for power-up safety |
| 2 | 1A | Input for buffer 1 - accepts 0–5.5 V signals regardless of VCC; CMOS-compatible threshold |
| 3 | 2Y | Output for buffer 2 - 3-state capable; sinks or sources up to 24 mA at 3.3 V |
| 4 | GND | Digital ground reference - must be connected to system ground plane with low-inductance path |
| 5 | 2A | Input for buffer 2 - electrically identical to 1A; supports independent signal conditioning paths |
| 6 | 1Y | Output for buffer 1 - noninverting, 3-state; matches 2Y in drive strength and timing |
| 7 | 2OE | Active-low output enable for buffer 2 - independently controllable from 1OE for selective bus gating |
| 8 | VCC | Positive supply - bypass with 0.1-µF ceramic capacitor placed within 2 mm of pin for stable switching noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage-tolerant inputs | Accepts 0–5.5 V input signals at any valid VCC (1.65–5.5 V), enabling seamless 5-V-to-3.3-V down-translation without external components |
| Ioff partial-power-down protection | Disables all I/O paths when VCC = 0 V, limiting leakage to ±10 µA - essential for hot-swap, battery-backed, or modular backplane designs |
| NanoFree™ packaging | Die-as-package construction eliminates leadframe, reducing size to 2.95 mm × 2.80 mm and improving thermal resistance (RθJA = 199.0°C/W) |
| High-drive push-pull outputs | ±24-mA drive at 3.3 V ensures fast edge rates into 50-pF loads, supporting clean signal integrity on short-to-medium PCB traces |
| Low static current | 10-µA max ICC across full VCC and temperature range - critical for always-on subsystems and low-power IoT edge nodes |
Applications
| Cable Modem Termination Systems | SSD Internal Interconnects |
|---|---|
Use Scenario: Isolating and buffering control signals between DOCSIS PHY and host processor in multi-channel CMTS chassis. IC Role / Device Role / Timing Role: Dual 3-state buffer managing bidirectional address/data strobes and reset lines across mixed-voltage domains (5-V PHY ↔ 3.3-V controller). Use Value: Input overvoltage tolerance eliminates level shifters; Ioff prevents back-drive during PHY firmware updates or hot-swap module replacement. |
Use Scenario: Driving command/address lines from SSD controller to NAND flash packages in M.2 or U.2 form factors. IC Role / Device Role / Timing Role: Signal repeater and bus isolator ensuring timing-critical NVMe command propagation with minimal skew and controlled drive strength. Use Value: 4.3-ns tpd at 3.3 V meets PCIe Gen3 setup/hold margins; ±24-mA drive sustains signal integrity across stacked NAND interposer traces. |
| Video Broadcasting Scalable Platforms | Military Radar Signal Conditioning |
Use Scenario: Buffering parallel video data lanes (e.g., SMPTE ST 2081-10 12G-SDI) between FPGA serializer and connector interface in broadcast switchers. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer enabling fanout to multiple BNC connectors while maintaining signal fidelity at 11.88 Gbps. Use Value: Balanced push-pull outputs minimize ground bounce (VOLP < 0.8 V); wide VCC range accommodates FPGA I/O bank voltages (1.8 V–3.3 V). |
Use Scenario: Isolating sensor interface signals (e.g., ADC clock distribution, trigger synchronization) in airborne radar front-end modules exposed to extreme thermal cycling. IC Role / Device Role / Timing Role: Radiation-tolerant signal gate controlling clock enable paths to high-speed ADCs and DACs during mission-critical phases. Use Value: –40°C to +125°C operation ensures reliability in uncooled avionics bays; latch-up immunity (>100 mA per JESD78 Class II) withstands EMI-induced transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC2G126DCT3 | Inverting output logic (Y = NOT A) vs. noninverting (Y = A) in SN74LVC2G125DCT3; otherwise identical electrical specs and pinout | Required where signal polarity inversion is needed in bus control or enable logic chains | Select SN74LVC2G126DCT3 only when functional inversion is explicitly required; no change to layout or power design |
| 74LVC2G125GW,125 | NXP variant in SC-88 (TSOP-8) package (2.2 mm × 2.45 mm); same logic function and DC specs, but higher RθJA (240°C/W) and different pin 1 marking | Suitable for cost-sensitive consumer designs where NanoFree™ size advantage is not critical | Choose 74LVC2G125GW,125 only if board space allows larger footprint and thermal budget permits higher junction rise |
Compared with SN74LVC2G125DCT3, SN74LVC2G126DCT3 provides identical performance with inverted logic - useful for complementary enable schemes - while 74LVC2G125GW,125 trades NanoFree™ miniaturization for broader distributor availability and lower unit cost in non-space-constrained applications.
Availability
SN74LVC2G125DCT3 is available at Aetrix Electronics and suitable for high-speed data acquisition, video broadcasting infrastructure, and military radar signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC2G125DCT3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in high-reliability logic and interface solutions.
The SN74LVC2G125DCT3 belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for robust mixed-voltage interfacing, low-power operation, and industrial-grade reliability in demanding embedded and infrastructure applications.
FAQ
What is the maximum input voltage rating for SN74LVC2G125DCT3?
The SN74LVC2G125DCT3 supports input voltages up to 5.5 V regardless of VCC level (1.65–5.5 V), enabling direct connection to 5-V sources while operating at 3.3 V or lower. This overvoltage tolerance eliminates external level-shifting components in mixed-voltage systems and is verified per Absolute Maximum Ratings in the official datasheet.
Does SN74LVC2G125DCT3 support hot-swap or partial-power-down operation?
Yes, SN74LVC2G125DCT3 includes Ioff circuitry that disables all I/O paths when VCC = 0 V, limiting leakage current to ±10 µA. This feature prevents damaging back-current flow during live insertion, modular backplane reconfiguration, or system sleep modes - making it suitable for hot-pluggable storage and telecom line cards.
What is the recommended pullup resistor value for OE pins on SN74LVC2G125DCT3?
TI recommends tying OE pins (1OE, 2OE) to VCC through a pullup resistor to ensure high-impedance state during power-up/down. The minimum resistor value depends on the driver's current-sinking capability; for typical use, a 10-kΩ resistor suffices. Lower values (e.g., 4.7 kΩ) improve noise immunity but increase static current - select based on system noise environment and power budget.
Can SN74LVC2G125DCT3 drive 50-pF loads at 100 MHz?
Yes, SN74LVC2G125DCT3 delivers ±24-mA output drive at 3.3 V and achieves 4.3-ns max tpd into light loads. With proper PCB layout (controlled impedance, minimized stubs), it reliably drives 50-pF loads at frequencies up to 100 MHz. Figure 6 in the datasheet confirms ICC remains below 10 µA at 10 MHz, indicating stable switching behavior well within this range.
Is SN74LVC2G125DCT3 pin-compatible with other 8-pin LVC dual buffers?
SN74LVC2G125DCT3 shares identical pinout with SN74LVC2G126DCT3 (inverting variant) and SN74LVC2G240DCT3 (dual inverting buffer with 2-bit bus hold), all in SM8 package. However, it is not pin-compatible with non-LVC families (e.g., 74AHC, 74HC) due to differing OE polarity or drive strength - always verify function table and timing before substitution.
SN74LVC2G125DCT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 8-LSSOP, 8-MSOP (0.110", 2.80mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 32mA
- Voltage - Supply:
- 1.65V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SM8
SN74LVC2G125DCT3 FAQ
1.How can I place an order for SN74LVC2G125DCT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC2G125DCT3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74LVC2G125DCT3 reliable?
The price and inventory of SN74LVC2G125DCT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC2G125DCT3 is usually 5 days.
3.What payment methods are accepted for SN74LVC2G125DCT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC2G125DCT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC2G125DCT3?
SN74LVC2G125DCT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC2G125DCT3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74LVC2G125DCT3?
For technical support, including SN74LVC2G125DCT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC2G125DCT3 requirements.
6.How does Aetrix verify that SN74LVC2G125DCT3 is sourced from the original manufacturer or authorized distributors?
All SN74LVC2G125DCT3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74LVC2G125DCT3 meets industry standards.
7.What is the process for return or replacement of SN74LVC2G125DCT3?
All SN74LVC2G125DCT3 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC2G125DCT3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74LVC2G125DCT3 part is unused and in its original packaging.
Return procedure for SN74LVC2G125DCT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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